Reversing-gear for steam-engines



(No Model.) 2 Sheets-Sheet 1.

J. L. SEYPANG.

REVERSING GEAR FOR STEAM ENGINES.

No. 536,897. I PatentedApr. 2, 1895.

FIG.2.

(No Model. 2 Sheets Sheet 2.

J. L. SEYFANG. REVERSING GEAR FOR STEAM ENGINES.

Patented Apr. 2, 1895 W/ TNE SSE 8.- 9mm (5 (WW A TTORNEYS NITED STATES- PATENT OFFICE.

JOHN L. SEYFANG, OF BRADFORD, PENNSYLVANIA.

REVERSING-GEAR FOR STEAM-ENGINES.

SPECIFICATION forming part of Letters Patent No. 536,897, dated April 2, 1895.

Application filed July 23, 1894- Serial No. 518,390. (No model.)

To aZZ whom it may concern:

Be it known that I, J OHN L. SEYFANG, a citizen of the United States, residing at Bradford, in the county of McKean and State of Pennsylvania, have invented a new and useful Improvement in Reversing-Gears for Steam- Engines, of which the following is a specification.

My invention relates to reversing gears for that class of steam engines that have the link or its equivalent, for the purpose of changing the direction of the crank rotation.

The object of my invention is to provide such steam engines with a long distance reversing gear, more especially that class of steam engines used on 'oil and Artesian wells, so that the workmen while in the derrick can have full control over the movement of the engine. I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure 1 represents a top view of a steam engine with my reversing gear attached. Fig. 2 is a side elevation of a steam engine with a valve stem slide-block broken away, in order to show the linkengaged with the slide-block pin. Fig. 3 is a side elevation of my reversing gear mechanism connected to the link,

the arm of the rotating reach-rod being raised. Fig. 4 is a side elevation of the hanger guideblock with pins. Fig. 5 is a front elevation of the reversing gear mechanism less the link, with the rotating reach-rod arm lowered. Fig. 6 is the outer end of the rotating reach-rod with a handle for turning it, and Fig. 7 is a cross-section of the standard and bent connecting-bar, through the lines A, B of Fig. 5.

Similar numerals refer to similar parts throughout the several views.

1 represents an engine provided with a steam chest 2.

3 represents the valve stem and 4 a block on the stem which slides in the journal box 5 on the engine bed 18. The block 4 is connected by means of the pin 6 to the link 7 which operates the valve, and which is operated by the reversing gear hereinafter described. The link 7 is moved by'the eccentrics which are connected with lugs 8, 9 on the link 7 by means of the eccentric rods. The link 7 is provided with the saddle 10, and the saddlepin 11 by which it is pivotally connected to the hanger arm of the reversing gear.

I will now proceed to describe my improved reversing gear.

12 represents the hanger arm of the reversing gear the lower end of which is pivotally connected with the saddle-pin l1 and the upper end of which is secured to a pin 13 on a block 14. This block is also provided with a pin 16 and it is adapted to slide in a hollow standard 15 (see Fig. 7) which is formed integral with the bracket 17 secured to the engine bed 18. This standard is provided with slots 19 and 20 in which the pins 15 and 16 of the block 14 fit and work.

2.7 represents a bent link (see Fig. 3) and having its respective ends pivotally connected with the pin 16 and pin 26 carried by the arm 23 of the rotating reach-rod 22. This rod is mounted at one end in the bearing 21 secured to the standard 15 and at its other end in a bearing plate 28, which should in an oil and Artesian well rig be secured to the dead head post (not shown) so that the operating handle 29, which may be of any construction, will always be within easy reach of the operator.

24 represents a hub for holding the arm 23 on the rod 22.

25 represents a stop on the standard 15 which limits the movement of the arm 23 when being turned to its lower position.

The operation of the reversing gear is as follows: In Fig. 5 the gear is shown in its lower center and when it is in this position the link 7 (not shown in this figure) is down and the engine in motion will run forward. When it becomes necessary to reverse the engine, the rod 22 is turned by the handle a half revolution to the right, and the arm 23 raised to its upper position as shown in Fig. 3, and carrying with it the bent link 27 which in turn raises the block 14, the link 12 and the link 7. When the link 7 is in this raised position the steam valve is changed, causing the engine to reverse.

The object in shaping the connecting link 27 as shown, and in throwing it and the upper end of the arm 23 to the position shown in Fig. 3 which is beyond the center of the rod 22, is for the purpose of locking the engine link 7 in the position shown in said figure The the lower movement of the arm 23.

Thus it will be seen that I have constructed a simple and efiective mechanism for reversing engines which is often required instantly in handling the tubing and sucker-rods, and while drilling oil and Artesian wells.

Having thus fully described my invention, the following is what I claim as new therein and desire to secure by Letters Patent:

1. In a reversing gear for steam engines, the combination of the engine bed, the hollow standard secured to the bed, the sliding block working therein and having connection with the engine link, the reach-rod journaled on the hollow standard and having a link connection with the sliding block, substantially as and for the purpose set forth.

2. In a reversing gear for steam engines the combination of the engine bed, the hollow standard secured to the bed, the rotating reach-rod having connection with the engine link and mounted on the said hollow standard at one end and on a suitable support at its other, substantially as and for the purpose set forth.

3. In a reversing gear for steam engines, the combination of the engine bed, the hollow standard secured to the bed, the rotating reach rod mounted on said hollow standard and provided with an arm which has connections with the sliding block by means of a bent link, substantially as and for the purpose set forth.

4. In a reversing gear for steam engines the combination of the engine bed, the hollow 5. In a reversing gear for steam engines the,

combination of the engine bed, the standard secured to said bed and provided with the stop 25, the reach rod provided with an arm and mounted at the one end on the standard and at the other end in the derrick of an oil or Artesian well rig, the bent link connecting the reach rod arm with the pin 16 of the sliding block, the hanger arm connecting the pin 13 of the sliding block to the enginelink saddle pin, substantially as and for the purpose set forth.

6. In a reversing gear for steam engines, the combination of the engine and engine bed, the hollow slotted standard mounted on said bed, a rotating reach rod provided with an arm mounted on said standard, a block sliding in said standard and having pins which project through the slots in the said standard, a link connected at one end to one of the pins in the block and at its other end to the engine link, and a bentlink connected with the other pin on the block and with the reach rod arm, substantially as shown and described.

JOHN L. SEYFANG.

Witnesses:

R. M. CLosE, J. E. WARD. 

